In the name of Allah the merciful the compassionate
The answers(s) to your question(s) is brought into two sections as such:
Meaning of shafa'a
Shafa‘ah means that an upstanding person who enjoys special high rank and proximity to God can appeal the Almighty Allah to forgive the sins of sinners, or elevate of the rank of others.
Quranic verses and authenticated narrations
Based on the Quranic verses, intercession:
- is negated (2:123)
exclusively belongs to Allah (6:70 and
39:44)
- while is only in the domain of Allah, He can grant it to special
people among His creations.
The following Quranic verses are related to the third section and support it:
No intercessor can plead with Him except by His
permission.(10:3)
Who is he that can intercede with Him except with His permission?
(2:255)
On that Day, no intercession shall avail, except the one from whom
Allah, the Most Gracious has given permission and whose word is
acceptable to Him.(20:109)
And they cannot intercede, except for Him with whom He is
pleased.(21:28)
None shall have the power of intercession except one who has received
permission or a promise from Allah, the Most Gracious.(19:87)
Intercession with Him profits none except for those He
permits.(34:23)
According to above verses, besides God, awliya’ (intimate friend of Allah) such as: prophets, Imams are allowed by Allah for intercession. The holy prophet of Islam is of the people who is granted intercession by Almighty Allah. He says:
"أعطيت خمساً وأعطيت الشفاعة فأدخرتها لأمتي."
“I have been granted five things… and I have been granted intercession
which I have reserved for my ummah.” (1)
Imam Ja‘far al-Sadiq, the sixth Imam of the school of Ahlul Bayt says:
“Verily, our intercession will never reach one who takes the prayers
lightly.”(2)
References:
1-Musnad Ahmad ibn Hanbal, vol. 1, p. 301; Sahih al-Bukhari (Egypt), vol. 1, p. 91.
2-al-Majlisi, Bihar al-Anwar, 82:236.